Pull-tension truss.



W. A. MURRAY. PULL TENSION TRUSS.

APPLICATION FILED JAN. 2, 191a.

Patented Apr. 7, 1914 2 SHEETS-SHEET 1.

W. A. MURRAY.

PULL TENSION TRUSS.

APPLICATION FILED JAN.2, 1913.

1,092,783. Patented Apr. '7, 19M

2 SHEETS-SHEET 2.

d- Wi -Myra COLUMBIA PLANUGRAPH co.. WASHINGTON. D, c

rrn.

WILLIAM MURRAY, OF LOS ANGELES, CALIFORNIA.

PULL-TENSION TRUSS.

Specification of Letters Patent.

Patented Apr. "3, 1911.

Application filed January 2, 1913. Serial No. 739,906.

To all whom it may concern Be it known that 1, WILLIAM A. MURRAY, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, ha e invented a new and useful Pull-Tension Truss, of which the following is a specification.

An object of this invention is to provide a device of this character which will have minimum tendency to be displaced under normal conditions of wearing it both day and night and under the abnormal conditions produced by excessive straining of the wearers body while bending in any manner demanded by any particular kind of work without inconveniencing the wearer.

Another object is the provision of uniform pressure at the portion of the body to be treated.

Another object is the provision of a device of this character in which the pressure produced by the pressure block or pad will be substantially axially inward from the pressure block.

Generally stated, I induce pressure upon the affected part of the body by correlating and focalizing the power exerted by the tension members and then evenly distributing the power radially from the focalizing center and, in other words, the power exerted by the tension members is centralized upon 7 the pressure block, which takes the place of the usual soft pad, and the tension members are pivoted at the axis of the pressure block.

More specifically I provide two pairs of tension members, the members of each pair being diametrically opposed to one another, the members of one pair extending laterally and the members of the other pair extending one up and the other down substantially at right angles to the laterally extending members and all of said members being united at the axis of the pressure block, thus unifying the powers exerted by the several tension members and permitting relative turning between the tension members and the pressure block.

The laterally extending tension members may each be formed of two elastic straps that may be of different powers, one of which is under tension during normal movements of the wearer and both of which straps are under tension during abnormal movements of the wearer.

Other objects and advantages may appear from the subjoined detailed description.

' Theaccompanying drawings illustrate the invention.

Figure 1 is a reduced perspective view of the invention as applied to the wearers body which is indicated in dotted lines. Fig. 2 is a broken outside elevation of some of the front parts shown in Fig. 1. Fig. 3 is a plan section on line indicated by 00 Fig. 2.

.Fig. 4 is an outside fragmentary elevation of the portion of the device at the left hand side of Fig. 1. Fig. 5 is a fragmentary plan section of the rear portion of the device on line indicated by a Fig. 1. Fig. 6 is an elevation of the rear buckle detached. Figs.

2 to 6 inclusive are on the same scale as one tension members and of the pressure member.

Solid lines indicate the minimum tension strap in commission, and dotted lines indicate both maximum and minimum tension traps in commission with the minimum tension strap stretched to the limit of its elasticity.

The tension members (Z, 6 both comprise maximum and minimum tension straps 11, 12, the maximum tension straps 11 being comparatively long and adjustably connected together at their back ends by a rear buckle 13 and provided at their front ends with jointed links 14 having perforations 15 to accommodate the journal 9, said perforations being large enough at one place to slip over the pivot-pin head 10; and the minimum tension straps 12 being comparatively short and provided with eyes 16 to engage buttons 17 fastened to the long tension straps l1 and provided at their adjacent ends with eyes 18 adapted to receive and hook over the journal 9.

The short tension straps 12 may be provided with adjusting buckles 19.

The upper tension strap f is provided at its lower end with an eye 20 adapted to receive the journal 9 and extends upward and is firmly held in place by any suitable means and as shown in the drawings is provided at its upper end with an eye 21 adapted to engage a button 22, or the like, indicated in dotted lines in Fig. 1 which button is fastened .to the shirt or under clothing, not shown,"of the wearer.

The under tension strap 9 is provided at its front end with a jointed link 23 having a perforation 2 1 to pass over the pivot-pin forcing strip 27 to prevent buckling and wrinkling of said tension strap 11 under the tension of the under-strap.

The rear buckle 13 isslotted to form end bars 28, middle bars 29 and intermediate bars 30 between the middle bars and the end bars so that, as clearly shown in Fig. 5, the ends of the longtension straps 11 will be looped around the middle bars 29, the two limbs of the loops extending on one side of the intermediate bars 30 and on the opposite side of the end bars 28 so as to firmly and adjustably connect said ends.

A pressure block member a and tension means 5 are in pivotal relation to one another so that relative turning can take place between them in order that when the tension means are turned about the pressure memher by movements of the wearers body 0 tending to produce such turning, the pressure member a will remain stationary and will not be twisted and rotated in the plane of said movement.

The pressure block member a is preferably an inflexible fiat circular block 1 of hard rubber, or the like, provided with a V rounded edge 2 and a flat face 3 adapted to contact with the body or clothing of the wearer at the place of rupture.

The block 1 is provided centrally with a screw threaded perforation 1 to receive the screw-threaded end of a shouldered pivotpin 5 and is provided with a counter-bore 6 to accommodate a nut 7 which is threaded on the inner end of the pivot-pin 5.

The shoulder 8 of the pivot-pin 5 rests against the front face of the pressure block 1 so that when the nut 7 is tightened the pivot-pin will be firmly locked in place.

The pivot-pin 5 extends outwardly from the shoulder 8 to form a smooth journal 9 and a head 10 at the outer end of the journal. The pivot-pin 5 forms the sole connection between the pressure block 1 and tension means I) so as to transmit the powers exerted by the tension means directly to the center of the pressure block, where said powers are unified and from whence the resultant pressure is radially distributed along the flat contact face 3 inwardly to the body of the wearer.

respectively substantially at right anglesto the laterally extending members.

The eyeslS and 20 are preferably formed large enough at one end to slip over 'the pivot-pin head 10 and small enough at the other end so that when said smaller ends are drawn to the journal 9 they will be retained by the head 10. V

In practical use the pressure block 1 will be adjusted over the rupture and the j ointed.

links 14, 23 of the long tension strapsll and under strap 9, and the eyes 18, 20 of the short tension straps 12 and upper strap f will be hooked over the pivot-pin 5, preferably in the order named, the eye 20 looking all in place.

The tension straps 12 will-be adjusted by the buckles 19 so as to produce slack portions 81 in the tension straps 11 as seen in Fig. 1, so that the tension straps 12 will alone act to cause pressure under normal conditions of wear and so that under excessive straining and bending of the wearers body the slack in the tension straps 11 will be taken up thus bringing the tension straps 11 into action to produce additional pressure to hold therupture.

The long tension straps 11 and the short tension straps 12 may be of different powers and, in the instance shown, the tension straps 12 are less powerful than the tension straps 11. j

The journal of the pivot-pin may be of any desired length and is preferably 9/16 of an inch, more or less, in length, and when know that the pressure block restsproperly on the place of rupture. I have found this to be of great importance. 7

The nut 7 may be locked on the pivot-pin 5 by breaking the threads on each side of the pivot-pin with a punch, or the like, so that the pivot-pin cannot become loose. This is indicated at h in Fig. 3. j r

The tension members are so adjusted that should any one member become strained or weakened byan unusual movement of the body, other of the tension members will cooperate so as to relieve and assist the-weak? ened member and still have a tendency to keep the pressure block in its proper place, thus decreasing the liability of any accident to the rupture. j

While it is preferable for sanitation and comfort that the pressure block should be constructed as herein described it is understood that the use of a soft pad or other kind of block in place of the hard rubber block described may be used Without avoiding the main features of the invention.

From the foregoing it is seen that the provision of a single pivot and tWo diametrically opposed pairs of separate tension members radiating therefrom and adapted to pull in diametrically opposite directions insures to a maximum degree against displacement of the pressure block, While at the same time the pressure produced will not be upward, downward, to the right or to the left, but will be substantially axially inward from the pivot.

I claim 1. A truss comprising a pressure block, laterally extending tension members fastened to the pressure block, an under strap fastened to the pressure block and fastened to one of said tension members, and a metal reinforcing strip at the junction of the under strap and said tension member.

2. A truss comprising a pressure block, laterally extending tension members fas tened to the pressure block, an under strap fastened to the pressure block, means fastening the under strap to one of said tension members, and a metal reinforcing strip fastened to said one tension member above said fastening means.

3. A truss comprising a pressure block having a single pivot, and two pairs of diametrically opposed tension members, the adjacent members of different pairs extending from the pivot at right angles to one another, the uppermost one of said tension members extending vertically and being provided with means to fasten said member to the under garment of the wearer.

4:. A truss comprising a pressure member having a screw-threaded central perforation and having a counter-bore at one end of the threaded perforation, a {pivot-pin having a shoulder resting against one face of the pressure block and screw-threaded into said screw-threaded perforation, a nut screw threaded onto the end of the pivotpin and seated in said counter-bore, and tension means connected to the pivot-pin.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 24th day of December, 1912.

WILLIAM A. MURRAY.

In presence of- JAMES R. TOWNSEND, GEoRcn H. HILES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

